XCON: Message Transfer Agent Replaces DDA Type "RFC-822" with DDA Type "SMTP" After Installing Service Pack 3

• Microsoft Exchange Server, version 5.5 SP3

SYMPTOMS

Under certain conditions, the Exchange Server 5.5. Service Pack 3 (SP3) message transfer agent (MTA) replaces the X.400 Header Field value of the domain-defined attribute (DDA) Type RFC-822 with the value "SMTP". This replacement can cause messages to not be delivered.

CAUSE

Exchange Server 5.5 SP3 introduces additional functionality to the MTA, including modifications to X.400 header handling. When this MTA receives an incoming message that contains an O/R address with a DDA Type of RFC-822, and is required to relay the message, it may change the DDA Type to SMTP before relaying the message. This problem does not occur in earlier versions of Exchange Server 5.5.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 5.5 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5 Service Pack 3.

Additional query words: X400 X.400 RFC822

Keywords : kbXchge550 kbXchge550bug kbXchge550fix exc55sp3
Version : winnt:5.5 SP3
Platform : winnt
Issue type : kbbug